Transport and distributions of naturally and anthropogenically sourced trace metals and arsenic in submarine canyons

Continental margins play a key role in the cycling of natural and anthropogenic trace metals (TMs) as pathways at the interface between landmasses and deep ocean basins but also as sinks. Knowledge of how short-lived forcings alter the export dynamics of TMs is essential for our understanding of the...

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Autores: Tarrés, Marta, Cerdà i Domènech, Marc, Pedrosa Pàmies, Rut, Baza Varas, Andrea, Calafat Frau, Antoni, Sanchez-Vidal, Anna, Canals Artigas, Miquel
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2023
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/208138
Acceso en línea:https://hdl.handle.net/2445/208138
Access Level:acceso abierto
Palabra clave:Metalls
Contaminants
Sediments marins
Geologia submarina
Arsènic
Metals
Pollutants
Marine sediments
Submarine geology
Arsenic
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spelling Transport and distributions of naturally and anthropogenically sourced trace metals and arsenic in submarine canyonsTarrés, MartaCerdà i Domènech, MarcPedrosa Pàmies, RutBaza Varas, AndreaCalafat Frau, AntoniSanchez-Vidal, AnnaCanals Artigas, MiquelMetallsContaminantsSediments marinsGeologia submarinaArsènicMetalsPollutantsMarine sedimentsSubmarine geologyArsenicContinental margins play a key role in the cycling of natural and anthropogenic trace metals (TMs) as pathways at the interface between landmasses and deep ocean basins but also as sinks. Knowledge of how short-lived forcings alter the export dynamics of TMs is essential for our understanding of their fate in that setting. Here we report time series of particulate metal fluxes in three submarine canyons —namely Escombreras, Almeria and the Garrucha-Almanzora system— of the South-Western Mediterranean Sea. Our research focuses on combining multi-elemental TMs (Al, Fe, Ti, Co, Cu, Mn, Ni, Pb and Zn) and As (a metalloid) contents of settling particles collected near the bottom by automated particle traps during one year, and seafloor sediment samples from below the traps. We assess the role of storms and bottom trawling in the off-shelf transport of particulate TMs and As, and the natural and anthropogenic contributions of TMs by using enrichment factors (EFs). The TM export fluxes and composition changed over the study period, from March 2015 to March 2016. TM fluxes increase in early spring 2015 in association with short-lived storm events and during calm months in the Garrucha-Almanzora Canyon system, likely due to sediment resuspension triggered by bottom trawling. In terms of composition, TMs in the sinking fluxes appear to be closely associated with lithogenic (Al, Fe and Ti) and authigenic (Mn) particles’ proxies. During storm events, the mass of settling particles in Escombreras and Almeria canyons was impoverished in Al, Fe, As, Co, Cu, Mn and Ni compared to other periods. The Garrucha-Almanzora Canyon system behaves differently as the above-described differences, are not observed there. Moreover, the TM composition of the sediments —with higher contents of Fe, Ti and several other TMs— in this canyon is barely tied to the composition of the settling particles. Finally, Cu and Zn contents, together with Pb in the northernmost Escombreras Canyon, are best explained by referring to anthropogenic sources. This work provides insights into the profound influence of the natural and anthropogenic forcings controlling the distributions and seasonal dynamics of particulate TMs and As in submarine canyons.Elsevier2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/208138Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1016/j.pocean.2023.103122Progress in Oceanography, 2023, vol. 218,https://doi.org/10.1016/j.pocean.2023.103122cc-by-nc (c) The Authors, 2023http://creativecommons.org/licenses/by-nc/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2081382026-05-27T06:46:51Z
dc.title.none.fl_str_mv Transport and distributions of naturally and anthropogenically sourced trace metals and arsenic in submarine canyons
title Transport and distributions of naturally and anthropogenically sourced trace metals and arsenic in submarine canyons
spellingShingle Transport and distributions of naturally and anthropogenically sourced trace metals and arsenic in submarine canyons
Tarrés, Marta
Metalls
Contaminants
Sediments marins
Geologia submarina
Arsènic
Metals
Pollutants
Marine sediments
Submarine geology
Arsenic
title_short Transport and distributions of naturally and anthropogenically sourced trace metals and arsenic in submarine canyons
title_full Transport and distributions of naturally and anthropogenically sourced trace metals and arsenic in submarine canyons
title_fullStr Transport and distributions of naturally and anthropogenically sourced trace metals and arsenic in submarine canyons
title_full_unstemmed Transport and distributions of naturally and anthropogenically sourced trace metals and arsenic in submarine canyons
title_sort Transport and distributions of naturally and anthropogenically sourced trace metals and arsenic in submarine canyons
dc.creator.none.fl_str_mv Tarrés, Marta
Cerdà i Domènech, Marc
Pedrosa Pàmies, Rut
Baza Varas, Andrea
Calafat Frau, Antoni
Sanchez-Vidal, Anna
Canals Artigas, Miquel
author Tarrés, Marta
author_facet Tarrés, Marta
Cerdà i Domènech, Marc
Pedrosa Pàmies, Rut
Baza Varas, Andrea
Calafat Frau, Antoni
Sanchez-Vidal, Anna
Canals Artigas, Miquel
author_role author
author2 Cerdà i Domènech, Marc
Pedrosa Pàmies, Rut
Baza Varas, Andrea
Calafat Frau, Antoni
Sanchez-Vidal, Anna
Canals Artigas, Miquel
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Metalls
Contaminants
Sediments marins
Geologia submarina
Arsènic
Metals
Pollutants
Marine sediments
Submarine geology
Arsenic
topic Metalls
Contaminants
Sediments marins
Geologia submarina
Arsènic
Metals
Pollutants
Marine sediments
Submarine geology
Arsenic
description Continental margins play a key role in the cycling of natural and anthropogenic trace metals (TMs) as pathways at the interface between landmasses and deep ocean basins but also as sinks. Knowledge of how short-lived forcings alter the export dynamics of TMs is essential for our understanding of their fate in that setting. Here we report time series of particulate metal fluxes in three submarine canyons —namely Escombreras, Almeria and the Garrucha-Almanzora system— of the South-Western Mediterranean Sea. Our research focuses on combining multi-elemental TMs (Al, Fe, Ti, Co, Cu, Mn, Ni, Pb and Zn) and As (a metalloid) contents of settling particles collected near the bottom by automated particle traps during one year, and seafloor sediment samples from below the traps. We assess the role of storms and bottom trawling in the off-shelf transport of particulate TMs and As, and the natural and anthropogenic contributions of TMs by using enrichment factors (EFs). The TM export fluxes and composition changed over the study period, from March 2015 to March 2016. TM fluxes increase in early spring 2015 in association with short-lived storm events and during calm months in the Garrucha-Almanzora Canyon system, likely due to sediment resuspension triggered by bottom trawling. In terms of composition, TMs in the sinking fluxes appear to be closely associated with lithogenic (Al, Fe and Ti) and authigenic (Mn) particles’ proxies. During storm events, the mass of settling particles in Escombreras and Almeria canyons was impoverished in Al, Fe, As, Co, Cu, Mn and Ni compared to other periods. The Garrucha-Almanzora Canyon system behaves differently as the above-described differences, are not observed there. Moreover, the TM composition of the sediments —with higher contents of Fe, Ti and several other TMs— in this canyon is barely tied to the composition of the settling particles. Finally, Cu and Zn contents, together with Pb in the northernmost Escombreras Canyon, are best explained by referring to anthropogenic sources. This work provides insights into the profound influence of the natural and anthropogenic forcings controlling the distributions and seasonal dynamics of particulate TMs and As in submarine canyons.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/208138
url https://hdl.handle.net/2445/208138
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1016/j.pocean.2023.103122
Progress in Oceanography, 2023, vol. 218,
https://doi.org/10.1016/j.pocean.2023.103122
dc.rights.none.fl_str_mv cc-by-nc (c) The Authors, 2023
http://creativecommons.org/licenses/by-nc/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc (c) The Authors, 2023
http://creativecommons.org/licenses/by-nc/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301629

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